<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

    <script>

        const cat = {
            name : '猫' , 
            age : 2 ,
            say : function() {
                console.log('喵');
            }
        }


        const dog = {
            name : '狗子' , 
            age : 3 ,
            say : function() {
                console.log('汪');
            }
        }



        cat.say()

    </script>
    
</body>
</html>